CN101267285B - Confirmation information feedback method - Google Patents
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- CN101267285B CN101267285B CN 200810096058 CN200810096058A CN101267285B CN 101267285 B CN101267285 B CN 101267285B CN 200810096058 CN200810096058 CN 200810096058 CN 200810096058 A CN200810096058 A CN 200810096058A CN 101267285 B CN101267285 B CN 101267285B
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Abstract
The present invention presents a confirmation information feedback method. The method comprises the following procedures: dividing a plurality of descending sub-frames into two descending sub-frame groups, and informing two divided descending sub-frame groups and the sequence numbers of the descending sub-frames which are included in each descending sub-frame group to a base station and a terminal, wherein, a plurality of descending sub-frames feed back the confirmation information in a same ascending sub-frame, and each descending sub-frame group at least comprises a descending sub-frame; and feeding back the data of the descending sub-frame group by the terminal with the indication field in the ascending physical control channel corresponding with two descending sub-frame groups. Through the invention, the transmission time delay of the system is reduced and the capability of the system is increased.
Description
Technical field
The present invention relates to the communications field, relate in particular to a kind of confirmation feedback method.
Background technology
Fig. 1 shows Long Term Evolution (Long Term Evolution, referred to as LTE) system's time division duplex (Time Division Duplex, referred to as TDD) frame structure of pattern, in this frame structure, the radio frames of a 10ms (radio frame) is divided into two fields (half frame), it is the 0.5ms time slot that each field is divided into 10 length, and adjacent two time slots form the subframe that length is 1ms.Comprise 5 subframes in a field.For standard cyclic prefix (Normal Cyclic Prefix is referred to as Normal CP), the symbol that it is 66.7us that time slot comprises 7 length, wherein the CP length of first symbol is 5.21us, the CP length of all the other 6 symbols is 4.69us; For Extended (Extended, expansion) CP, a time slot comprises 6 symbols, and the CP length of all symbols is 16.67us.In this frame structure, the preparation characteristics of subframe are:
(1) in order to reduce the configured number of ascending-descending subframes number, LTE TDD has stipulated the allocation plan of 7 kinds of ascending-descending subframes numbers in a radio frames, and is as shown in table 1, under the heterogeneous networks configuration mode, and the allocation plan of ascending-descending subframes in radio frames.All subframes all are divided three classes, descending sub frame, special subframe and sub-frame of uplink, and wherein, D represents descending sub frame, and U represents sub-frame of uplink, and S represents special subframe.For example configuration mode is 1 o'clock, subframe 2,3, and 7,8 is sub-frame of uplink, subframe 0,4,5,9 is descending sub frame, subframe 1,6 is special subframe.
(2) special subframe comprises 3 special time slots; respectively descending pilot frequency time slot (Downlink Pilot Time Slot; referred to as DwPTS), the protection interval (GuardPeriod; referred to as GP) and uplink pilot time slot (Uplink Pilot Time Slot is referred to as UpPTS).Wherein, DwPTS is used for descending, and a minimum symbol is used for transmission primary synchronization channel (Primary-Synchronization Channel is referred to as P-SCH); GP is guard time, does not transmit any data; UpPTS is used for up, can be used for the signals such as transmission Random Access Channel (Random Access Channel is referred to as RACH), detecting pilot frequency.
(3) the previous subframe of special subframe is fixed as descending sub frame, a rear subframe fixed bit sub-frame of uplink of special subframe.
Table 1 LTE TDD up-downgoing proportional arrangement
DL/UL is than transfer point subframe numbers
Routine configuration cycle 0123456789
0 5ms D S U U U D S U U U
1 5ms D S U U D D S U U D
2 5ms D S U D D D S U D D
3 10ms D S U U U D D D D D
4 10ms D S U U D D D D D D
5 10ms D S U D D D D D D D
6 10ms D S U U U D S U U D
In LTE TDD, subscriber equipment (User Equipment, referred to as UE) can be at Physical Uplink Control Channel (the PhysicalUplink Control Channel of the sub-frame of uplink of subframe n+k (k＞3), referred to as PUCCH) in, to (the Physical Downlink Shared Channel of the Physical Downlink Shared Channel in descending sub frame n, referred to as PDSCH) transmission the data feedback confirmation, correctly reply (ACK)/wrong responses (NACK); Also can be used for 0 feedback acknowledgment information in the Physical Uplink Shared Channel (Physical Uplink Shared Channel is referred to as PUSCH) of transmitting uplink data in this sub-frame of uplink.Wherein, subframe sequence number and its corresponding Physical Downlink Control Channel (the Physical DownlinkControl Channel of the index of sub-frame of uplink PUCCH by sending downlink data, referred to as PDCCH) the implicit indication of minimum control channel unit (ControlChannel Element is referred to as the CCE) sequence number at place;
In LTE TDD, the number of subframes of descending distribution can be greater than the number of subframes of uplink assignment, namely sub-frame of uplink need to feed back the confirmation information of a plurality of PDSCH subframes, and table 2 shows under the difference configuration of table 1, the corresponding descending sub frame number of sub-frame of uplink feeding back downlink PDSCH.Because the up needs of LTE satisfy single-carrier property, need to the PUCCH in a sub-frame of uplink in the ACK/NACK information of a plurality of descending PDSCH subframes of feedback.
The scheme of prior art is for to carry out AND-operation with the ACK/NACK information of a plurality of descending sub frames, as long as it is NACK that confirmation message corresponding to the PDSCH of a descending sub frame is namely arranged, result is just NACK, only having the confirmation message corresponding to PDSCH of all descending sub frames is all ACK, result is just ACK, represents that the PDSCH of all descending sub frames receives correct.If confirmation is NACK, the base station need to resend the PDSCH data of these all descending sub frames of user.
Corresponding descending sub frame number during table 2 sub-frame of uplink feedback acknowledgment information
DL/UL is than all subframe numbers of transfer point
The example configuration phase 0123456789
0 - - 1 - 1 - - 1 - 1
1 5ms - - 2 1 - - - 2 1 -
2 - - 4 - - - - 4 - -
3 - - 3 2 2 - - - - -
4 10ms - - 4 4 - - - - - -
5 - - 9 - - - - - - -
6 - - 1 1 1 - - 1 1 -
when adopting said method, when if UE does not correctly detect control channel PDCCH corresponding to the descending sub frame that belongs to it, subscriber equipment just can feeding back ACK/nack message, interrupted emission (Disontinuous Transmission appears, referred to as DTX) situation, confirmation information corresponding to the data of transmitting in this descending sub frame so just can not participate in the AND-operation process, be easy to like this confirmation information (DTX should the be considered as NACK) mistake that should feed back NACK is fed back with ACK, UE can appear in the situation of this descending sub frame loss of data, UE can not be correct obtain the information that the data block that receives is transmitted, need the more high-rise retransmission process of carrying out, this has just increased extra time-delay.
Summary of the invention
When considering the confirmation information of a plurality of descending sub frames of terminal feedback that exist in correlation technique, the propagation delay time of system increases, and causes the problem of poor system performance and proposes the present invention, for this reason, main purpose of the present invention is to provide a kind of confirmation feedback method, to address the above problem.
According to an aspect of the present invention, provide a kind of confirmation feedback method.
Comprise according to the confirmation information feedback method of the embodiment of the present invention: a plurality of descending sub frames are divided into two descending sub frame groups, and sequence number informing base station and the terminal of two descending sub frame groups that will be divided into and the included descending sub frame of each descending sub frame group, wherein, a plurality of descending sub frames are in same sub-frame of uplink feedback acknowledgment information, and each descending sub frame group comprises a descending sub frame at least; Terminal utilizes the indication field in ascending physical signal control channel corresponding to two descending sub frame groups that the data of descending sub frame group are fed back.
Wherein, above-mentioned indication field takies 2 bits, wherein, for each descending sub frame group, represents its confirmation with 1 bit respectively, if terminal uses 1 bit to carry out wrong responses at least one data decode mistake that the descending sub frame group sends; If terminal is correct to all data decodes that the descending sub frame group sends, use 1 bit correctly to reply.
Further, the method also comprises: in response to wrong responses, the base station retransmits all data in descending sub frame group corresponding to wrong responses.
Preferably, above-mentionedly utilize indication field in ascending physical signal control channel corresponding to two descending sub frame groups to feed back concrete operations to the data of descending sub frame group to be: select arbitrary descending sub frame in two descending sub frame groups as the reference descending sub frame; The indicated ascending physical signal control channel in minimum control channel unit with reference to the corresponding Physical Downlink Control Channel of descending sub frame place is set to ascending physical signal control channel corresponding to descending sub frame group.
Wherein, above-mentioned is one of following with reference to descending sub frame: in two descending sub frame groups, and first descending sub frame that terminal receives, last descending sub frame that terminal receives.
According to another aspect of the present invention, provide a kind of confirmation feedback method.
Comprise according to the confirmation information feedback method of the embodiment of the present invention: a plurality of descending sub frames are divided into several descending sub frame groups, a plurality of descending sub frames are in same sub-frame of uplink feedback acknowledgment information, and sequence number informing base station and the terminal of several descending sub frame groups that will be divided into and the included descending sub frame of each descending sub frame group, wherein, each descending sub frame group comprises a descending sub frame or two descending sub frames; Be provided for representing being transferred in the subframe group first indication field of number of the descending sub frame of terminal data; The base station uses the descending sub frame group to send data to terminal, and comprises the first indication field at the descending control signaling of downlink physical control channel corresponding to terminal; Terminal utilizes the second indication field in ascending physical signal control channel corresponding to two descending sub frame groups that the data of descending sub frame group are fed back.
Preferably, above-mentioned base station uses one or two descending sub frame group to send data to terminal simultaneously.
Preferably, above-mentioned the first indication field takies 1 bit.
Preferably, above-mentioned the second indication field takies 2 bits, wherein, for each descending sub frame group, represents its confirmation with 1 bit respectively, if terminal uses 1 bit to carry out wrong responses at least one data decode mistake that the descending sub frame group sends; If terminal is correct to all data decodes that the descending sub frame group sends, use 1 bit correctly to reply.
Wherein, if the data that have in interior two descending sub frames of above-mentioned descending sub frame group send to terminal, but terminal receives only the data that one of them descending sub frame sends, and 1bit confirmation corresponding to this descending sub frame group is wrong responses.
Wherein, the default value of confirmation information corresponding to above-mentioned two descending sub frame groups is wrong indication; If terminal is only received data on descending sub frame corresponding to descending sub frame group, 1bit confirmation corresponding to another descending sub frame group is wrong responses.
Further, the method comprises: in response to wrong responses, the base station retransmits all data in descending sub frame group corresponding to wrong responses.
Utilize the second indication field in ascending physical signal control channel corresponding to two subframe groups to feed back concrete operations to the data of subframe group to be: select arbitrary descending sub frame in two descending sub frame groups as the reference descending sub frame; The indicated ascending physical signal control channel in minimum control channel unit with reference to the corresponding Physical Downlink Control Channel of descending sub frame place is set to ascending physical signal control channel corresponding to descending sub frame group.
Preferably, above-mentioned is one of following with reference to descending sub frame: in two descending sub frame groups, and first descending sub frame that terminal receives, last descending sub frame that terminal receives.
Preferably, above-mentioned a plurality of descending sub frames are divided into several descending sub frame groups, a plurality of descending sub frames utilize the concrete operations of same sub-frame of uplink feedback acknowledgment information to be: when having at most two descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, two descending sub frames are divided into two descending sub frame groups, and each descending sub frame group respectively comprises a descending sub frame; When three descending sub frames are arranged at most with same sub-frame of uplink feedback acknowledgment information, two descending sub frames are divided into two descending sub frame groups, first descending sub frame group contains two descending sub frames, second descending sub frame group contains a descending sub frame, perhaps first descending sub frame group contains a descending sub frame, two descending sub frames of second descending sub frame combination; When having at most the confirmation information of four descending sub frames to send on a sub-frame of uplink, be divided into two descending sub frame groups, each descending sub frame group respectively contains two descending sub frames.
Preferably, above-mentioned a plurality of descending sub frames are divided into several subframe groups, a plurality of descending sub frames utilize the concrete operations of same sub-frame of uplink feedback acknowledgment information to be: when having at most the confirmation information of nine descending sub frames to send on a sub-frame of uplink, from first descending sub frame, every three continuous descending sub frames are divided into three large groups as a large group with descending sub frame; Each large group is further subdivided into two descending sub frame groups, the first descending sub frame group contains two descending sub frames, the second descending sub frame group contains a descending sub frame, and perhaps the first descending sub frame group contains a descending sub frame, and the second descending sub frame group contains two descending sub frames; In descending sub frame corresponding to sub-frame of uplink, the base station is each terminal Resources allocation on the descending sub frame in corresponding two descending sub frame groups in an above-mentioned large group at most.
By above-mentioned at least one technical scheme of the present invention, reduced the propagation delay time of system, improved the performance of system.
Description of drawings
Accompanying drawing is used to provide a further understanding of the present invention, and consists of the part of specification, is used for together with embodiments of the present invention explaining the present invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the frame structure schematic diagram according to the long evolving system TDD mode of correlation technique;
Fig. 2 is the flow chart according to the confirmation information feedback method of the inventive method embodiment one;
Fig. 3 is that the network configuration pattern according to the inventive method embodiment one is the schematic diagram of the corresponding sub-frame of uplink of descending sub frame of 4 o'clock;
Fig. 4 is that a plurality of descending sub frames according to the inventive method embodiment one utilize same sub-frame of uplink feedback acknowledgment information schematic diagram;
Fig. 5 is the flow chart according to the confirmation information feedback method of the inventive method embodiment two;
Fig. 6 utilizes the schematic diagram of same sub-frame of uplink feedback acknowledgment information according to a plurality of descending sub frames of the inventive method embodiment two.
Embodiment
Defined a kind of form format 1b in the up PUCCH channel of LTE, it adopts the modulation system of QPSK, can transmit simultaneously the ACK/NACK information of 2bit, confirmation information corresponding to two data flow during 2bit stipulate this form in present LTE in is respectively used to represent SU-MIMO (SingleUser-Multiple Input Multiple Output, alone family multiple-input and multiple-output).
Describe the present invention in detail below in conjunction with accompanying drawing.
Embodiment of the method one
According to the embodiment of the present invention, provide a kind of confirmation feedback method.
Fig. 2 is that as shown in Figure 2, the method comprises the following steps according to the flow chart of the confirmation information feedback method of the embodiment of the present invention:
Step S202, a plurality of descending sub frames are divided into two descending sub frame groups, and sequence number informing base station and the terminal of two descending sub frame groups that will be divided into and the included descending sub frame of each descending sub frame group, wherein, a plurality of descending sub frames are in same sub-frame of uplink feedback acknowledgment information, and each descending sub frame group comprises a descending sub frame at least;
Step S204, terminal utilizes the indication field in ascending physical signal control channel corresponding to two descending sub frame groups that the data of descending sub frame group are fed back.
By the technical scheme that the embodiment of the present invention provides, reduced the propagation delay time of system, improved the performance of system.
Preferably, in step S202, indication field can take 2 bits, wherein, for each descending sub frame group, represent its confirmation with 1 bit respectively, if terminal uses 1 bit to carry out wrong responses at least one data decode mistake that the descending sub frame group sends; If terminal is correct to all data decodes that the descending sub frame group sends, use 1 bit correctly to reply.
Preferably, in step S204, in response to wrong responses, the base station retransmits all data in descending sub frame group corresponding to wrong responses.
Preferably, in step S202, utilize indication field in ascending physical signal control channel corresponding to two descending sub frame groups to feed back concrete operations to the data of descending sub frame group to be: select arbitrary descending sub frame in two descending sub frame groups as the reference descending sub frame; The indicated ascending physical signal control channel in minimum control channel unit with reference to the corresponding Physical Downlink Control Channel of descending sub frame place is set to ascending physical signal control channel corresponding to descending sub frame group.
Wherein, above-mentioned is one of following with reference to descending sub frame: in two descending sub frame groups, and first descending sub frame that terminal receives, last descending sub frame that terminal receives.
Embodiment one
Send confirmation information corresponding to a plurality of descending sub frames when not considering DTX on the PUCCH of a sub-frame of uplink.
In LTE TDD, if a plurality of descending sub frame utilizes same sub-frame of uplink feedback acknowledgment information, above-mentioned a plurality of descending sub frames are divided into two groups, the grouping situation need the base station and UE two ends as offered good;
UE is according to the grouping agreement, represent respectively confirmation information corresponding to descending sub frame PDSCH data in two subframe groups with 2bit (being indication field mentioned above), this 2bit information can use the format 1b form of LTE PUCCH to send, and uses the indicated PUCCH of minimum CCE at the corresponding PDCCH of certain descending sub frame place of appointing in advance when UE sends this acknowledge message.Wherein, the confirmation information of each subframe group represents with 1bit, can correctly reply (ACK) with " 1 " expression, " 0 " expression wrong responses (NACK), perhaps conversely, " 1 " expression wrong responses (NACK), (NACK) correctly replied in " 0 " expression; In group, confirmation information corresponding to each descending sub frame PDSCH data of this user uses AND-operation to merge (if any SU-MIMO, each stream also participates in AND-operation), if it is NACK that the confirmation information of the data of a descending sub frame transmission is arranged in this subframe group, the confirmation information of this subframe group is NACK, and the base station needs all data of transmission in this subframe group are resend.
Wherein, for the concrete operations that a plurality of descending sub frames are divided into two groups be:
When having at most two descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into two subframe groups, respectively comprise a descending sub frame in each subframe group;
When having at most three descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided in two subframe groups, can the first subframe group comprise two descending sub frames, the second subframe group comprises a descending sub frame, perhaps, the first subframe group comprises a descending sub frame, and the second subframe group comprises two descending sub frames;
When having at most four descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into two subframe groups, can respectively comprise two descending sub frames in each subframe group; Perhaps, the first subframe group comprises a descending sub frame, and the second subframe group comprises three descending sub frames; Perhaps, the first subframe group comprises three descending sub frames, and the second subframe group comprises a descending sub frame;
When having at most nine descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into two subframe groups, can the first subframe subframe group comprise 5 descending sub frames, the second subframe group comprises 4 descending sub frames, perhaps conversely; Can the first subframe group comprise 6 descending sub frames, the second subframe group comprises 3 descending sub frames, perhaps conversely; Can the first subframe group comprise 7 descending sub frames, the second subframe group comprises 2 descending sub frames, perhaps conversely; Can the first subframe group comprise 8 descending sub frames, the second subframe group comprises 1 descending sub frame, perhaps conversely.
Showing the network configuration pattern as Fig. 3 is the corresponding sub-frame of uplink of descending sub frame of 4 o'clock.as shown in Figure 3, take LTE TDD system as example, suppose continuous 20 subframes, when the up-downgoing proportional arrangement is the configuration 4 of above-mentioned table 1, subframe 0, subframe 1, subframe 4, subframe 5, subframe 6, subframe 7, subframe 8, subframe 9, subframe 10, subframe 11, subframe 14, subframe 15, subframe 16, subframe 17, subframe 18, subframe 19 is descending sub frame, subframe 2, subframe 3, subframe 12, subframe 13 is sub-frame of uplink, according to the up-downgoing timing relationship, descending sub frame 0, 1, 4, 5 confirmation information (ACK/NACK) is fed back on sub-frame of uplink 12, descending sub frame 6, 7, 8, 9 ACK/NACK feeds back on sub-frame of uplink 13.
Fig. 4 shows a plurality of descending sub frames and utilizes same sub-frame of uplink feedback acknowledgment information schematic diagram.As shown in Figure 4, arrange in advance subframe 6, subframe 7 is the first subframe group, and subframe 8, subframe 9 are the second subframe group.suppose that the user is in subframe 6, subframe 7, subframe 8, the PDSCH that belongs to this user is arranged on subframe 9, and the PDSCH data on each subframe are two data flow (SU-MIMO), at first subframe 6, the confirmation information of each stream on subframe 7 (4bit altogether) is merged into 1bit by AND-operation, equally subframe 8, the confirmation information of each stream on subframe 9 (4bit altogether) is merged into 1bit by AND-operation, at last more than the 2bit that obtains use the QPSK modulation, a modulation symbol after modulation is carried on upper send (the format 1b mode of LTE PUCCH) of a PUCCH of pre-determined sub-frame of uplink 12.
Embodiment of the method two
According to the embodiment of the present invention, provide a kind of confirmation feedback method.
Fig. 5 is that as shown in Figure 5, the method comprises the following steps according to the flow chart of the confirmation information feedback method of the embodiment of the present invention:
Step S502, a plurality of descending sub frames are divided into several descending sub frame groups, a plurality of descending sub frames are in same sub-frame of uplink feedback acknowledgment information, and sequence number informing base station and the terminal of several descending sub frame groups that will be divided into and the included descending sub frame of each descending sub frame group, wherein, each descending sub frame group comprises a descending sub frame or two descending sub frames;
Step S504 is provided for representing being transferred in the subframe group first indication field of number of the descending sub frame of terminal data;
Step S506, the base station uses the descending sub frame group to send data to terminal, and comprises the first indication field at the descending control signaling of downlink physical control channel corresponding to terminal;
Step S508, terminal utilizes the second indication field in ascending physical signal control channel corresponding to two descending sub frame groups that the data of descending sub frame group are fed back.
Technical scheme by the embodiment of the present invention provides solves the problem that downlink data is lost, thereby reduces time delay, guarantees the performance of system.Can effectively improve feedback efficiency and system works efficient.
Preferably, in step S502, above-mentioned base station can use one or two descending sub frame group to send data to terminal simultaneously.
Preferably, in step S502, above-mentioned the first indication field takies 1 bit.
Preferably, in step S502, above-mentioned the second indication field can take 2 bits, wherein, for each descending sub frame group, represent its confirmation with 1 bit respectively, if terminal uses 1 bit to carry out wrong responses at least one data decode mistake that the descending sub frame group sends; If terminal is correct to all data decodes that the descending sub frame group sends, use 1 bit correctly to reply.
Wherein, if the data that have in interior two descending sub frames of above-mentioned descending sub frame group send to terminal, but terminal receives only the data that one of them descending sub frame sends, and 1bit confirmation corresponding to this descending sub frame group is wrong responses.
Preferably, the default value of confirmation information corresponding to above-mentioned two descending sub frame groups is wrong indication; If terminal is only received data on descending sub frame corresponding to descending sub frame group, 1bit confirmation corresponding to another descending sub frame group is wrong responses.
Preferably, in step S508, in response to wrong responses, the base station retransmits all data in descending sub frame group corresponding to wrong responses.
Preferably, in step S508, utilize the second indication field in ascending physical signal control channel corresponding to two subframe groups to feed back concrete operations to the data of subframe group to be: select arbitrary descending sub frame in two descending sub frame groups as the reference descending sub frame; The indicated ascending physical signal control channel in minimum control channel unit with reference to the corresponding Physical Downlink Control Channel of descending sub frame place is set to ascending physical signal control channel corresponding to descending sub frame group.
Wherein, above-mentioned is one of following with reference to descending sub frame: in two descending sub frame groups, and first descending sub frame that terminal receives, last descending sub frame that terminal receives.
Preferably, above-mentioned a plurality of descending sub frames are divided into several descending sub frame groups, a plurality of descending sub frames utilize the concrete operations of same sub-frame of uplink feedback acknowledgment information to be:
When having at most two descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, two descending sub frames are divided into two descending sub frame groups, each descending sub frame group respectively comprises a descending sub frame;
When three descending sub frames are arranged at most with same sub-frame of uplink feedback acknowledgment information, two descending sub frames are divided into two descending sub frame groups, first descending sub frame group contains two descending sub frames, second descending sub frame group contains a descending sub frame, perhaps first descending sub frame group contains a descending sub frame, and second descending sub frame group contains two descending sub frames; When having at most the confirmation information of four descending sub frames to send on a sub-frame of uplink, be divided into two descending sub frame groups, each descending sub frame group respectively contains two descending sub frames.
Preferably, above-mentioned a plurality of descending sub frames are divided into several subframe groups, a plurality of descending sub frames utilize the concrete operations of same sub-frame of uplink feedback acknowledgment information to be: when having at most the confirmation information of nine descending sub frames to send on a sub-frame of uplink, from first descending sub frame, every three continuous descending sub frames are divided into three large groups as a large group with descending sub frame; Each large group is further subdivided into two descending sub frame groups, the first descending sub frame group contains two descending sub frames, the second descending sub frame group unification descending sub frame, perhaps the first descending sub frame group contains a descending sub frame, and the second descending sub frame group contains two descending sub frames; In descending sub frame corresponding to sub-frame of uplink, the base station is each terminal Resources allocation on the descending sub frame in corresponding two descending sub frame groups in an above-mentioned large group at most.
Embodiment two
When considering DTX occurs, send confirmation information corresponding to a plurality of descending sub frames on the PUCCH of a sub-frame of uplink:
In order to prevent that UE from not receiving the PDCCH of certain descending sub frame in group, can stipulate: in LTE TDD, a plurality of descending sub frames that utilize same sub-frame of uplink feedback acknowledgment information are divided into some subframe groups, wherein, maximum two descending sub frames of every subframe group, grouping situation need the base station and the UE as offered good.
Increase 1bit information (being the first indication field mentioned above) in the PDCCH of the assigned descending sub frame of UE, this 1bit information represents whether two descending sub frames in the subframe group have all distributed data to this UE.for example: can all distribute data to this UE with two descending sub frames in " 1 " expression subframe group, in " 0 " expression subframe group, a descending sub frame has distributed data to this UE, if two descending sub frames that UE receives in the subframe group have all distributed data to this UE, PDCCH can send to UE with " 1 ", if the DTX situation has occured this moment, UE has received only the data that one of them descending sub frame distributes, but UE is according to " 1 " that receives, know mistake has occured, DTX namely occurs, should be considered as NACK to DTX, can be to base station feedback NACK, the base station re-starts transmission with all data of transmission in this subframe.
The default value of the confirmation information that above-mentioned two descending sub frame groups are corresponding is wrong indication; If terminal is only received data on descending sub frame corresponding to descending sub frame group, 1bit confirmation corresponding to another descending sub frame group is wrong responses.
In addition, UE can use 2bit (being the second indication field mentioned above) to represent respectively confirmation information corresponding to descending sub frame PDSCH data in two subframe groups.In the subframe group, confirmation information corresponding to each descending sub frame PDSCH data of this user uses AND-operation to merge (if any SU-MIMO, each stream also participates in AND-operation), and UE uses the format 1b form of LTE PUCCH to send; When sending this acknowledge message, UE uses the corresponding PUCCH of minimum CCE at certain the descending sub frame PDCCH place appoint in advance.The method has described in detail at embodiment one, is not described in detail here.
For a plurality of descending sub frames being divided into some subframe groups, the concrete operations of maximum two descending sub frames of every subframe group are:
When having at most two descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into two subframe groups, every subframe group comprises a descending sub frame;
When having at most three descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into two subframe groups, the first subframe group comprises two descending sub frames, and the second subframe group comprises a descending sub frame, perhaps the first subframe group comprises a descending sub frame, and the second subframe group comprises two descending sub frames;
When having at most four descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into two subframe groups, every subframe group comprises two descending sub frames; Perhaps be divided into three subframe groups, one of them subframe group comprises two descending sub frames, and all the other two subframe groups respectively comprise a descending sub frame; Perhaps be divided into four subframe groups, each subframe group respectively includes a descending sub frame;
When having at most nine descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, be divided into five subframe groups, wherein there is a subframe group to include a descending sub frame, all the other four subframe groups respectively include two descending sub frames; Perhaps be divided into six subframe groups, wherein have three subframe groups respectively to include a descending sub frame, other three subframe groups respectively include two descending sub frames; Perhaps be divided into seven subframe groups, wherein have five subframe groups respectively to include a descending sub frame, another two subframe groups respectively include two descending sub frames; Perhaps be divided into eight subframe groups, wherein have seven subframe groups respectively to include a descending sub frame, another one subframe group includes two descending sub frames; Perhaps be divided into nine subframe groups, each subframe group respectively includes a descending sub frame; Perhaps,
When having at most nine descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, from first descending sub frame, every three continuous descending sub frames are divided into three large groups as a large group with described descending sub frame;
Each large group is further subdivided into two descending sub frame groups, the first descending sub frame group contains two descending sub frames, the second descending sub frame group contains a descending sub frame, and perhaps the first descending sub frame group contains a descending sub frame, and the second descending sub frame group contains two descending sub frames;
In descending sub frame corresponding to sub-frame of uplink, the base station is each terminal Resources allocation on the descending sub frame in corresponding two descending sub frame groups in an above-mentioned large group at most.
For example, arrange in advance subframe 6, subframe 7 is first subframe group, and subframe 8, subframe 9 are second subframe group.Suppose the user in subframe 6, subframe 7 has the PDSCH that belongs to this user, and subframe 8 also has the PDSCH that belongs to this user, but does not belong to this user's PDSCH on subframe 9, in subframe 6, and subframe 7, the PDSCH data on subframe 8 are all individual traffics.Under above-mentioned assumed condition, in subframe 6, in subframe 7, to increasing 1bit in user's PDCCH, being arranged to 1 two subframes that are illustrated in the first subframe group has PDSCH to belong to this user; To increasing 1bit in user's PDSCH, be arranged to 0 and be illustrated in and only have this subframe to have PDSCH to belong to this user in the second subframe group in subframe 8.
Fig. 6 shows a plurality of descending sub frames and utilizes same sub-frame of uplink feedback acknowledgment information schematic diagram.As shown in Figure 6, if UE detects the PDCCH that belongs to it in subframe 6, but the PDCCH that belongs to it in subframe 7 do not detected, two subframes (subframe 6 and subframe 7) that include in this subframe group of 1bit indication information sign due to the PDCCH that belongs to it in subframe 6 all should have the PDCCH that belongs to this UE, so this moment, UE should generate 1bit NACK (DTX is equal to NACK) information after using AND-operation; UE detects the second subframe group subframe, if the PDCCH that belongs to this UE in subframe 8 correctly detected, although do not detect the PDCCH that whether belongs to this UE on subframe 9, only have because include 1bit indication information sign on the PDCCH that belongs to this UE on subframe 8 PDCCH that includes this UE in a subframe in this subframe group, this moment, UE can not think because not receiving the PDCCH on subframe 9 DTX, thereby generate the 1bit nack message, correctly generate 1bit ACK or NACK but whether receive according to the data on subframe 8.At last more than the 2bit that obtains use the QPSK modulation, a modulation symbol after modulation is carried on the upper transmission of a PUCCH (the format 1b mode of LTE PUCCH) of pre-determined sub-frame of uplink 12.
As mentioned above, by means of confirmation feedback method provided by the invention, provide the ascending physical signal control channel form format 1b in a kind of LTE of utilization to send the scheme of confirmation information corresponding to a plurality of descending sub frames in ascending physical signal control channel of LTE TDD, the method can solve the problem that downlink data is lost, thereby the minimizing time delay guarantees the performance of system.Can effectively improve feedback efficiency and system works efficient.
Certainly; the present invention also can have other various embodiments; in the situation that do not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art work as can make according to the present invention various corresponding changes and distortion, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the present invention.
The above is only the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any modification of doing, be equal to replacement, improvement etc., within all should being included in protection scope of the present invention.
Claims (16)
1. a confirmation feedback method, is characterized in that, comprising:
A plurality of descending sub frames are divided into two descending sub frame groups, and sequence number informing base station and the terminal of two descending sub frame groups that will be divided into and the included descending sub frame of each descending sub frame group, wherein, described a plurality of descending sub frame is in same sub-frame of uplink feedback acknowledgment information, and each descending sub frame group comprises a descending sub frame at least;
Described terminal utilizes the indication field in ascending physical signal control channel corresponding to each described descending sub frame group that the data of each described descending sub frame group are fed back.
2. method according to claim 1, it is characterized in that, described indication field takies 2 bits, wherein, for each descending sub frame group, represent its confirmation with 1 bit respectively, if described terminal uses 1 bit to carry out wrong responses at least one data decode mistake that the descending sub frame group sends; If described terminal is correct to all data decodes that the descending sub frame group sends, use 1 bit correctly to reply.
3. method according to claim 1 and 2, is characterized in that, further comprises:
In response to wrong responses, described base station retransmits all data in described descending sub frame group corresponding to described wrong responses.
According to claim 1 in, it is characterized in that, describedly utilize indication field in ascending physical signal control channel corresponding to each described descending sub frame group to feed back concrete operations to the data of each described descending sub frame group to be:
Select arbitrary descending sub frame in described two descending sub frame groups as the reference descending sub frame;
The described indicated ascending physical signal control channel in minimum control channel unit with reference to the corresponding Physical Downlink Control Channel of descending sub frame place is set to ascending physical signal control channel corresponding to described descending sub frame group.
5. method according to claim 4, is characterized in that, described is one of following with reference to descending sub frame: in described two descending sub frame groups, and last descending sub frame that first descending sub frame that described terminal receives, described terminal receive.
6. a confirmation feedback method, is characterized in that, comprising:
A plurality of descending sub frames are divided into several descending sub frame groups, described a plurality of descending sub frame is in same sub-frame of uplink feedback acknowledgment information, and sequence number informing base station and the terminal of several descending sub frame groups that will be divided into and the included descending sub frame of each descending sub frame group, wherein, each descending sub frame group comprises a descending sub frame or two descending sub frames;
Be provided for representing the first indication field of the number of the descending sub frame of transmission terminal data in described subframe group;
Described base station uses each described descending sub frame group to send data to described terminal, and comprises described the first indication field at the descending control signaling of downlink physical control channel corresponding to described terminal;
Described terminal utilizes the second indication field in ascending physical signal control channel corresponding to each described descending sub frame group that the data of described descending sub frame group are fed back.
7. method according to claim 6, is characterized in that, described base station uses one or two described descending sub frame group to send data to described terminal simultaneously.
8. the described method of any one according to claim 6 or 7, is characterized in that, described the first indication field takies 1 bit.
9. method according to claim 6, it is characterized in that, described the second indication field takies 2 bits, wherein, for each descending sub frame group, represent its confirmation with 1 bit respectively, if described terminal uses 1 bit to carry out wrong responses at least one data decode mistake that the descending sub frame group sends; If described terminal is correct to all data decodes that the descending sub frame group sends, use 1 bit correctly to reply.
10. method according to claim 9, it is characterized in that, if have data to send to described terminal in two descending sub frames in each described descending sub frame group, but described terminal receives only the data that one of them descending sub frame sends, and 1bit confirmation corresponding to this descending sub frame group is wrong responses.
11. method according to claim 9 is characterized in that, the default value of the confirmation information that described two descending sub frame groups are corresponding is wrong indication; If described terminal is only received data on descending sub frame corresponding to descending sub frame group, 1bit confirmation corresponding to another descending sub frame group is wrong responses.
12. method according to claim 9 is characterized in that, further comprises:
In response to described wrong responses, described base station retransmits all data in described descending sub frame group corresponding to described wrong responses.
13. method according to claim 6 is characterized in that, describedly utilizes the second indication field in ascending physical signal control channel corresponding to two described descending sub frame groups to feed back concrete operations to the data of described subframe group to be:
Select arbitrary descending sub frame in two described descending sub frame groups as the reference descending sub frame;
The described indicated ascending physical signal control channel in minimum control channel unit with reference to the corresponding Physical Downlink Control Channel of descending sub frame place is set to ascending physical signal control channel corresponding to described descending sub frame group.
14. method according to claim 13 is characterized in that, described is one of following with reference to descending sub frame: in two described descending sub frame groups, and last descending sub frame that first descending sub frame that described terminal receives, described terminal receive.
15. method according to claim 6 is characterized in that, described a plurality of descending sub frames is divided into several descending sub frame groups, described a plurality of descending sub frames utilize the concrete operations of same sub-frame of uplink feedback acknowledgment information to be:
When having two descending sub frames to utilize same sub-frame of uplink feedback acknowledgment information, described two descending sub frames are divided into two descending sub frame groups, each descending sub frame group respectively comprises a descending sub frame;
When three descending sub frames are arranged with same sub-frame of uplink feedback acknowledgment information, described three descending sub frames are divided into two descending sub frame groups, first descending sub frame group contains two descending sub frames, second descending sub frame group contains a descending sub frame, perhaps first descending sub frame group contains a descending sub frame, and second descending sub frame group contains two descending sub frames;
When having the confirmation information of four descending sub frames to send on a sub-frame of uplink, be divided into two descending sub frame groups, each descending sub frame group respectively contains two descending sub frames.
16. method according to claim 6 is characterized in that, described a plurality of descending sub frames is divided into several subframe groups, described a plurality of descending sub frames utilize the concrete operations of same sub-frame of uplink feedback acknowledgment information to be:
When having the confirmation information of nine descending sub frames to send on a sub-frame of uplink, from first descending sub frame, every three continuous descending sub frames are divided into three large groups as a large group with described descending sub frame;
Each large group is further subdivided into two descending sub frame groups, the first descending sub frame group contains two descending sub frames, the second descending sub frame group contains a descending sub frame, and perhaps the first descending sub frame group contains a descending sub frame, and the second descending sub frame group contains two descending sub frames;
In descending sub frame corresponding to sub-frame of uplink, the base station is the descending sub frame quantity that comprises in corresponding in an above-mentioned large group two descending sub frame groups for the maximum of the descending sub frame quantity of each terminal distribution.
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| CN101267284B (en) | 2008-04-25 | 2013-01-16 | 中兴通讯股份有限公司 | Method for confirmation information feedback in physical uplink share channel |
| CN101686113B (en) * | 2008-09-22 | 2014-04-09 | 中兴通讯股份有限公司 | Realizing method, dividing method and multiplexing method of feedback channel |
| WO2010069154A1 (en) * | 2008-12-19 | 2010-06-24 | 大唐移动通信设备有限公司 | Method and device for transmitting feedback information |
| CN101488832B (en) * | 2009-01-19 | 2013-11-06 | 中兴通讯股份有限公司 | Channel detecting and processing method, terminal and base station |
| CN102088341B (en) * | 2009-12-04 | 2013-04-17 | 电信科学技术研究院 | Transmitting method and transmitting device of feedback information |
| CN102237990A (en) * | 2010-04-30 | 2011-11-09 | 北京三星通信技术研究有限公司 | Method for determining sequential relationship of hybrid-automatic repeat request of relay link |
| CN102315916B (en) * | 2010-07-06 | 2013-12-04 | 华为技术有限公司 | Method and device for sending downlink distribution indication, method and device for feeding back responder channel |
| EP2618515B1 (en) * | 2010-09-15 | 2018-11-07 | LG Electronics Inc. | Method and apparatus for transmitting control information |
| CN102469506B (en) * | 2010-11-08 | 2014-06-11 | 华为技术有限公司 | Transmission method of response information, apparatuses and system |
| CN103326833B (en) * | 2012-03-22 | 2018-01-26 | 中兴通讯股份有限公司 | A kind of determination method and apparatus of up-downgoing timing relationship |
| CN103427938B (en) * | 2012-05-18 | 2018-11-27 | 电信科学技术研究院 | Method, system and the equipment of configurating channel measurement and DL CSI feedback |
| CN104168602B (en) * | 2013-05-17 | 2018-06-15 | 华为技术有限公司 | The method and terminal of a kind of feedback acknowledgment information and base station |
| CN107113117B (en) * | 2015-04-17 | 2021-04-20 | 华为技术有限公司 | Information feedback method, equipment and system |
| CN109120382B (en) * | 2017-06-22 | 2020-07-28 | 华为技术有限公司 | Signal transmitting and receiving method and device |
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